Changes
This {{NAMESPACE}} is used... : Not just for templates – also for modules
| type = content
| text =
'''This template {{lcfirst:{{NAMESPACE}}}} is used {{#if:{{{1|}}}|{{{1}}}|in system messages}}.''' <br> Changes to it can cause immediate changes to the Wikipedia user interface. To avoid large-scale disruption, any changes should first be tested in this template's [[{{#switch: {{SUBPAGENAME}}
| doc | sandbox = {{SUBJECTSPACE}}:{{BASEPAGENAME}}
| #default = {{SUBJECTPAGENAME}}